qmlDeferredExecute() crashes with grouped properties

T.Button {
    implicitWidth: background.implicitWidth // depency
    background: Rectangle { ... } // deferred
}

Button {
    background: Rectangle { ... } // overrides
}

Button {
    background.visible: false // boom
}

#include <QtQml>

class DeferredType : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QObject *deferredObject READ deferredObject WRITE setDeferredObject NOTIFY deferredObjectChanged)
    Q_CLASSINFO("DeferredPropertyNames", "deferredObject")

public:
    DeferredType(QObject *parent = nullptr) : QObject(parent) { }

    QObject *deferredObject() const
    {
        if (!m_deferredObject)
            qmlExecuteDeferred(const_cast<DeferredType *>(this));
        return m_deferredObject;
    }

    void setDeferredObject(QObject *object)
    {
        if (m_deferredObject == object)
            return;
        delete m_deferredObject;
        m_deferredObject = object;
        emit deferredObjectChanged();
    }

signals:
    void deferredObjectChanged();

private:
    QObject *m_deferredObject = nullptr;
};

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);

    qmlRegisterType<DeferredType>("main", 1, 0, "DeferredType");

    QQmlEngine engine;
    QQmlComponent component(&engine);
    component.setData("import main 1.0; DeferredType { deferredObject.objectName: 'foo'; objectName: deferredObject.objectName }", QUrl());
    component.create(); // BOOM
}

#include "main.moc"

Thread 1 "untitled811" received signal SIGSEGV, Segmentation fault.
0x0000000000401da4 in DeferredType::qt_static_metacall (_o=<error reading variable: Cannot access memory at address 0x7fffff7fefe8>, _c=<error reading variable: Cannot access memory at address 0x7fffff7fefe4>, 
    _id=<error reading variable: Cannot access memory at address 0x7fffff7fefe0>, _a=<error reading variable: Cannot access memory at address 0x7fffff7fefd8>) at ./main.moc:78
78	{
(gdb) bt
#0  0x0000000000401da4 in DeferredType::qt_static_metacall (_o=<error reading variable: Cannot access memory at address 0x7fffff7fefe8>, 
    _c=<error reading variable: Cannot access memory at address 0x7fffff7fefe4>, _id=<error reading variable: Cannot access memory at address 0x7fffff7fefe0>, 
    _a=<error reading variable: Cannot access memory at address 0x7fffff7fefd8>) at ./main.moc:78
#1  0x000000000040200b in DeferredType::qt_metacall (this=0x668e10, _c=QMetaObject::ReadProperty, _id=0, _a=0x7fffff7ff0e0) at ./main.moc:156
#2  0x00007f3bdd4a2388 in QMetaObject::metacall (object=<optimized out>, cl=cl@entry=QMetaObject::ReadProperty, idx=<optimized out>, argv=argv@entry=0x7fffff7ff0e0) at kernel/qmetaobject.cpp:301
#3  0x00007f3bddaa1d3f in QQmlObjectCreator::setPropertyBinding (this=this@entry=0x95ea60, property=property@entry=0x7f3bcc0054c8, binding=binding@entry=0x7f3bcc00b218) at qml/qqmlobjectcreator.cpp:781
#4  0x00007f3bddaa3662 in QQmlObjectCreator::setupBindings (this=this@entry=0x95ea60, applyDeferredBindings=applyDeferredBindings@entry=true) at qml/qqmlobjectcreator.cpp:703
#5  0x00007f3bddaa3a61 in QQmlObjectCreator::populateDeferredProperties (this=0x95ea60, instance=0x0, instance@entry=0x668e10) at qml/qqmlobjectcreator.cpp:273
#6  0x00007f3bdda10a08 in QQmlComponentPrivate::beginDeferred (enginePriv=enginePriv@entry=0x623700, object=object@entry=0x668e10, state=state@entry=0x7fffff7ff480) at qml/qqmlcomponent.cpp:892
#7  0x00007f3bdd9f752a in QtQml::qmlExecuteDeferred (object=0x668e10) at qml/qqmlengine.cpp:1467
#8  0x0000000000402539 in DeferredType::deferredObject (this=0x668e10) at ../untitled811/main.cpp:15
#9  0x0000000000401e77 in DeferredType::qt_static_metacall (_o=0x668e10, _c=QMetaObject::ReadProperty, _id=0, _a=0x7fffff7ff5f0) at ./main.moc:103
#10 0x000000000040200b in DeferredType::qt_metacall (this=0x668e10, _c=QMetaObject::ReadProperty, _id=0, _a=0x7fffff7ff5f0) at ./main.moc:156
#11 0x00007f3bdd4a2388 in QMetaObject::metacall (object=<optimized out>, cl=cl@entry=QMetaObject::ReadProperty, idx=<optimized out>, argv=argv@entry=0x7fffff7ff5f0) at kernel/qmetaobject.cpp:301
#12 0x00007f3bddaa1d3f in QQmlObjectCreator::setPropertyBinding (this=this@entry=0x95e880, property=property@entry=0x7f3bcc0054c8, binding=binding@entry=0x7f3bcc00b218) at qml/qqmlobjectcreator.cpp:781
#13 0x00007f3bddaa3662 in QQmlObjectCreator::setupBindings (this=this@entry=0x95e880, applyDeferredBindings=applyDeferredBindings@entry=true) at qml/qqmlobjectcreator.cpp:703
#14 0x00007f3bddaa3a61 in QQmlObjectCreator::populateDeferredProperties (this=0x95e880, instance=0x0, instance@entry=0x668e10) at qml/qqmlobjectcreator.cpp:273
#15 0x00007f3bdda10a08 in QQmlComponentPrivate::beginDeferred (enginePriv=enginePriv@entry=0x623700, object=object@entry=0x668e10, state=state@entry=0x7fffff7ff990) at qml/qqmlcomponent.cpp:892
#16 0x00007f3bdd9f752a in QtQml::qmlExecuteDeferred (object=0x668e10) at qml/qqmlengine.cpp:1467